d4mr

Prithvish Baidya — systems engineer — d4mr.com

You might also know me as earthish or d4mr (deformer).

• ETHIndia 2024 Winner — 1st place with zkRail. ZK proofs meet game theory meet fiat rails.
• ERC-7518 co-author — an actual Ethereum standard I helped write. for compliant RWA tokenization.
• Zypherpunk 2025 - 1st place Electric Coin Company track, Network State + Raybot + Tachyon bounties
• Built the first ERC-4337 multichain wallet — weekend hackathon POC at Biconomy that became a thing.
• engine-core — production Rust web3 backend of your dream. the best thing I've ever built.

Smart contracts executing real-world payments without bank accounts. Zero-knowledge proofs meet game theory. Won Coinbase, CDP, and Polygon tracks because apparently the judges were as hyped as I was.

2.5 years of learnings distilled into 25k lines of Rust. Sophisticated nonce management, crash recovery, exactly-once delivery. All that coordination complexity that used to keep me up at 3am debugging nonce sync hell? Gone. The flow became poetry: recover, confirm, send, yield.

inside engine-core also lies BullMQ-lite. We built twmq because nothing had the queue semantics we needed.

Transparent to shielded Zcash transactions. Unified Rust core, WASM for web. Privacy is cool.

Batch image processing entirely client-side. No uploads, no registration, no ads, no bullshit. Just works.

Rust CLI to dump directory structure and file contents for LLM context. Built it because I needed it.

Golang CLI for dynamically embedding targeted ads into podcast media files.

Backend: Rust, TypeScript, Go, GraphQL, PostgreSQL, Redis, Kafka

Web3: Solidity, Viem, ERC-4337, EIP-2771, EIP-7702, L2/Rollups, FHE

Frontend: React, Next.js, Tailwind, Tanstack (yes I can frontend, I just prefer not to)

thirdweb — Software Engineer (2024-2025) Built Engine and Vault. Production transaction infrastructure and non-custodial key management secured with AWS Nitro Enclaves. Got to "rewrite it in Rust" and actually ship it.

Zoniqx — Lead Architect (2022-2024) Co-authored ERC-7518. Built first compliant RWA tokenization layer on XRPL. Led major rewrites because sometimes you just have to burn it down and start fresh.

Biconomy — Software Engineer (2021-2022) Helped gasless infrastructure revamp processing millions of transactions for clients like JP Morgan. Built the first multichain ERC-4337 wallet as a weekend hackathon POC.

Libertas Network — Senior Fullstack Developer (2021) First full-time role building blockchain-based censorship-resistant podcasting infrastructure.

I write about weird edge cases, 3am debugging sessions, and "wait why does this have two valid hashes" rabbit holes.

Latest on d4mr.com/posts:

• The Case of the Phantom Hash — HyperEVM system transactions have two valid hashes. down the nanoreth rabbit hole.
• Flashblocks Broke Our Assumptions — how flashblocks and EIP-7702 forced us to rethink everything.
• We Open Sourced engine-core — 25k lines of love, sweat, and Rust.

• blog: d4mr.com
• projects: d4mr.com/projects
• about: d4mr.com/about
• x: @earth_ish
• linkedin: prithvish-baidya

_{Open to chatting about engineering, distributed systems, or collaboration. (Hire Me!) DM me.}